<template>
<view>
  <view class="history-box">
    <!-- 使用 uni-ui 提供的搜索组件 -->
   <uni-search-bar @input="input" :radius="100" cancelButton="none"></uni-search-bar>
  </view>
  <!-- 搜索数据 -->
<view class="sugg-list" v-if="searchList.length !== 0">
  <view class="sugg-item" v-for="(item, i) in searchList" :key="i" @click="gotoDetail(item.goods_id)">
    <view class="goods-name">{{item.goods_name}}</view>
    <uni-icons type="arrowright" size="16" ></uni-icons>
  </view>
</view>
<!-- 历史记录 -->
<view class="history-box" v-else>
  <view class="history-title">
    <text>搜索历史</text>
    <uni-icons type="trash" size="18" @click="deleteHis"></uni-icons>
  </view>
  <view class="history-list">
    <uni-tag :text="item" v-for="(item, i) in histories" :key="i" @click="goList(item)"></uni-tag>
  </view>
</view>
</view>
</template>

<script>
  export default {
    data() {
      return {
        timer:null,
        kw:'',
        searchList:[],
        historyList: []
      };
    },
    onLoad(){
    this.historyList = JSON.parse(uni.getStorageSync('kw') ||" []")
    },
    computed:{
      // 查询顺序
      histories(){
        return  [...this.historyList].reverse()
      }
    },
  methods:{
    input(e){
      clearTimeout(this.timer)
        this.timer = setTimeout(() => {
          this.kw = e
          console.log(this.kw)
          this.getSearchList()
        }, 500)
    },
    gotoDetail(goods_id) {
      uni.navigateTo({
        url: '/subpackage/goods_detail/goods_detail?goods_id=' + goods_id
      })
    },
    async getSearchList() {
      // 判断关键词是否为空
      if (this.kw === '') {
        this.searchList = []
        return
      }
      // 发起请求，获取搜索建议列表
      const { data: res } = await uni.$http.get('/api/public/v1/goods/qsearch', { query: this.kw })
      if (res.meta.status !== 200) return uni.$showMsg()
      this.searchList = res.message
      this.saveSearch()
    },
    saveSearch(){
      // this.historyList.push(this.kw)
      // 重复
      const set = new Set(this.historyList)
      set.delete(this.kw)
      set.add(this.kw)
      this.historyList = Array.from(set)
      //持久化
      uni.setStorageSync('kw',JSON.stringify(this.historyList))
    },
    deleteHis(){
      console.log(1)
      this.historyList = []
      uni.setStorageSync('kw','[]')
    },
    goList(item){
       uni.navigateTo({
         url:'/subpackage/goods_list/goods_list?query='+item
       })
    }
  }
  }
</script>

<style lang="scss">
.history-box {
  padding: 0 5px;

  .history-title {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 40px;
    font-size: 13px;
    border-bottom: 1px solid #efefef;
  }

  .history-list {
    display: flex;
    flex-wrap: wrap;

    .uni-tag {
      margin-top: 5px;
      margin-right: 5px;
    }
  }
}
.sugg-list {
  padding: 0 5px;

  .sugg-item {
    font-size: 12px;
    padding: 13px 0;
    border-bottom: 1px solid #efefef;
    display: flex;
    align-items: center;
    justify-content: space-between;

    .goods-name {
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
      margin-right: 3px;
    }
  }
}
.history-box {
  padding: 0 5px;

  .history-title {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 40px;
    font-size: 13px;
    border-bottom: 1px solid #efefef;
  }

  .history-list {
    display: flex;
    flex-wrap: wrap;

    .uni-tag {
      margin-top: 5px;
      margin-right: 5px; 
    }
  }
}
</style>
